<template>
  <!-- 网上copy -->
  <div class="box">
    <div class="container right-panel-active">
      <!-- 注 册 -->
      <div class="container__form container--signup">
        <form action="#" class="form" id="form1">
          <h2 class="form__title">注 册</h2>
          <input type="text" placeholder="User" class="input" />
          <input type="password" placeholder="Password" class="input" />
          <button class="btn">注 册</button>
        </form>
      </div>

      <!-- 登 录 -->
      <div class="container__form container--signin">
        <form action="#" class="form" id="form2" v-model="ruleForm">
          <h2 class="form__title" @click="submitForm">登 录</h2>
          <input type="text" placeholder="Email" class="input" v-model="ruleForm.account" />
          <input type="password" placeholder="Password" class="input" v-model="ruleForm.passWord" />
          <a href="#" class="link">Forgot your password?</a>
          <button class="btn" @click="submitForm">登 录</button>
        </form>
      </div>

      <!-- Overlay -->
      <div class="container__overlay">
        <div class="overlay">
          <div class="overlay__panel overlay--left">
            <button class="btn" id="signIn">登 录</button>
          </div>
          <div class="overlay__panel overlay--right">
            <button class="btn" id="signUp">注 册</button>
          </div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
export default {
  name: 'Login2',
  data() {
    return {
      ruleForm: {
        account: '',
        passWord: '',
      },
    };
  },
  mounted() {
    //防止刷新出现login页面
    this.$parent.showLoginPageSelector = false;

    const signInBtn = document.getElementById('signIn');
    const signUpBtn = document.getElementById('signUp');
    const fistForm = document.getElementById('form1');
    const secondForm = document.getElementById('form2');
    const container = document.querySelector('.container');

    signInBtn.addEventListener('click', () => {
      container.classList.remove('right-panel-active');
    });

    signUpBtn.addEventListener('click', () => {
      container.classList.add('right-panel-active');
    });

    fistForm.addEventListener('submit', e => e.preventDefault());
    secondForm.addEventListener('submit', e => e.preventDefault());
  },
  methods: {
    submitForm(formName) {
      const account = this.ruleForm.account;
      const passWord = this.ruleForm.passWord;
      // 检查账号和密码是否匹配
      if (account === 'admin' && passWord === 'admin') {
        // 账号密码匹配，导航到首页
        this.$router.push('/');
      } else {
        // 账号密码不匹配，输出错误信息
        console.log('账号或密码错误！');
      }
    },
  },
  beforeRouteLeave(to, from, next) {
    // 在路由离开前隐藏选择框
    this.$parent.showLoginPageSelector = false;

    if (to.name === 'login') {
      this.$parent.showLoginPageSelector = true;
    }

    next();
  },
};
</script>

<style>
/* 更多特效请关注CSDN博主-拄杖盲学轻声码 */
:root {
  --white: #e9e9e9;
  --gray: #333;
  --blue: #0367a6;
  --lightblue: #008997;

  --button-radius: 0.7rem;

  --max-width: 758px;
  --max-height: 420px;

  font-size: 16px;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell,
    'Open Sans', 'Helvetica Neue', sans-serif;
}

.box {
  align-items: center;
  background-color: var(--white);
  background: url('@/assets/image/background.webp');
  background-attachment: fixed;
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  display: grid;
  height: 97vh;
  place-items: center;
}

.form__title {
  font-weight: 300;
  margin: 0;
  margin-bottom: 1.25rem;
}

.link {
  color: var(--gray);
  font-size: 0.9rem;
  margin: 1.5rem 0;
  text-decoration: none;
}

.container {
  background-color: var(--white);
  border-radius: var(--button-radius);
  box-shadow: 0 0.9rem 1.7rem rgba(0, 0, 0, 0.25), 0 0.7rem 0.7rem rgba(0, 0, 0, 0.22);
  height: var(--max-height);
  max-width: var(--max-width);
  overflow: hidden;
  position: relative;
  width: 100vw;
}

.container__form {
  height: 100%;
  position: absolute;
  top: 0;
  transition: all 0.6s ease-in-out;
}

.container--signin {
  left: 0;
  width: 50%;
  z-index: 2;
}

.container.right-panel-active .container--signin {
  transform: translateX(100%);
}

.container--signup {
  left: 0;
  opacity: 0;
  width: 50%;
  z-index: 1;
}

.container.right-panel-active .container--signup {
  animation: show 0.6s;
  opacity: 1;
  transform: translateX(100%);
  z-index: 5;
}

.container__overlay {
  height: 100%;
  left: 50%;
  overflow: hidden;
  position: absolute;
  top: 0;
  transition: transform 0.6s ease-in-out;
  width: 50%;
  z-index: 100;
}

.container.right-panel-active .container__overlay {
  transform: translateX(-100%);
}

.overlay {
  background-color: var(--lightblue);
  background: url('@/assets/image/background.webp');
  background-attachment: fixed;
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  height: 100%;
  left: -100%;
  position: relative;
  transform: translateX(0);
  transition: transform 0.6s ease-in-out;
  width: 200%;
}

.container.right-panel-active .overlay {
  transform: translateX(50%);
}

.overlay__panel {
  align-items: center;
  display: flex;
  flex-direction: column;
  height: 100%;
  justify-content: center;
  position: absolute;
  text-align: center;
  top: 0;
  transform: translateX(0);
  transition: transform 0.6s ease-in-out;
  width: 50%;
}

.overlay--left {
  transform: translateX(-20%);
}

.container.right-panel-active .overlay--left {
  transform: translateX(0);
}

.overlay--right {
  right: 0;
  transform: translateX(0);
}

.container.right-panel-active .overlay--right {
  transform: translateX(20%);
}

.btn {
  background-color: var(--blue);
  background-image: linear-gradient(90deg, var(--blue) 0%, var(--lightblue) 74%);
  border-radius: 20px;
  border: 1px solid var(--blue);
  color: var(--white);
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: bold;
  letter-spacing: 0.1rem;
  padding: 0.9rem 4rem;
  text-transform: uppercase;
  transition: transform 80ms ease-in;
}

.form > .btn {
  margin-top: 1.5rem;
}

.btn:active {
  transform: scale(0.95);
}

.btn:focus {
  outline: none;
}

.form {
  background-color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  padding: 0 3rem;
  height: 100%;
  text-align: center;
}

.input {
  background-color: #fff;
  border: none;
  padding: 0.9rem 0.9rem;
  margin: 0.5rem 0;
  width: 100%;
}

@keyframes show {
  0%,
  49.99% {
    opacity: 0;
    z-index: 1;
  }

  50%,
  100% {
    opacity: 1;
    z-index: 5;
  }
}
</style>
